Thermon Group Holdings, Inc. Annual report pursuant to Section 13 and 15(d)

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 19,626	$ 11,379
Contract with Customer, Liability	$ 8,010	$ 2,959
Revenues recognized at point in time
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of total revenue	60.40%	58.60%	59.60%
Revenues recognized over time
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of total revenue	39.60%	41.40%	40.40%